Which option best describes the function of a switch?
A. An open switch prevents electric flow, and a closed switch allows electric
flow
B. An open switch strengthens electric flow, and a closed switch weakens
electric flow
C. An open switch allows electric flow, and a closed switch prevents electric
flow
D. An open switch allows electric flow, and a closed switch allows electric
flow

A

Explanation:

A switch is a part of a circuit that allows a connection to be made or broken. By convention, when the switch is "open", the connection is broken and therefore electric flow (current) cannot pass. On the other hand, when the switch is "closed", the connection is complete and electric flow can pass.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.